Finding the Fourth Proportional to 1,245.83, 1,868.69 and 514.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,245.83 : 1,868.69 = 514.90 : x
2. Step 2: Convert to fraction form
   1,245.83/1,868.69 = 514.90/x
3. Step 3: Cross multiply
   1,245.83x = 1,868.69 × 514.90
4. Step 4: Simplify right side
   1,245.83x = 962,185.10
5. Step 5: Solve for x
   x = 962,185.10/1,245.83
6. Step 6: Final answer
   x = 772.32